Initial commit: Personal Dashboard

Next.js 16 dashboard with configurable widgets (favorites, notes, calendar,
clock, calculator, search, domain-check), multi-tab support, user auth,
dark mode, and Docker deployment.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,5 @@
+INITIAL_ADMIN_EMAIL=admin@example.local
+INITIAL_ADMIN_PASSWORD=BitteEinLangesSicheresPasswortSetzen
+SESSION_COOKIE_SECURE=false
+SESSION_TTL_DAYS=30
+CALENDAR_ENCRYPTION_KEY=JXNaZHH97FDgFBI2SSi04tTyu4yWwaJxb/EEyma72AM=